ARROW-15515: [C++] Update ExecPlan example code and documentation with new options

[vibhatha]

This PR includes a documentation update for streaming execution engine and a table_sink example.

[github-actions]

https://issues.apache.org/jira/browse/ARROW-15515

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[vibhatha]

cc @westonpace included the table_sink option. I added a separate example for this and updated the docs.

Do you think we should replace the collector function ExecutePlanAndCollectAsTable with a table_sink ?

[westonpace]

Looks good. I added a few wording suggestions. This will conflict with #12721 so one of the two will need to rebase (which gets merged second).

[vibhatha]

@westonpace Thank you for the review. I will address these issues.

[westonpace]

Thanks! Just a few minor grammatical suggestions.

[ursabot]

Benchmark runs are scheduled for baseline = fe11431 and contender = 7d4e93d. 7d4e93d is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Finished ⬇️0.0% ⬆️0.0%] ec2-t3-xlarge-us-east-2
[Failed ⬇️0.92% ⬆️0.13%] test-mac-arm
[Failed ⬇️0.36% ⬆️0.0%] ursa-i9-9960x
[Finished ⬇️0.17% ⬆️0.0%] ursa-thinkcentre-m75q
Buildkite builds:
[Finished] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-ec2-t3-xlarge-us-east-2/builds/488| 7d4e93da ec2-t3-xlarge-us-east-2>
[Failed] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-test-mac-arm/builds/473| 7d4e93da test-mac-arm>
[Finished] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-ursa-i9-9960x/builds/474| 7d4e93da ursa-i9-9960x>
[Finished] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-ursa-thinkcentre-m75q/builds/483| 7d4e93da ursa-thinkcentre-m75q>
[Finished] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-ec2-t3-xlarge-us-east-2/builds/487| fe11431a ec2-t3-xlarge-us-east-2>
[Finished] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-test-mac-arm/builds/472| fe11431a test-mac-arm>
[Failed] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-ursa-i9-9960x/builds/473| fe11431a ursa-i9-9960x>
[Finished] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-ursa-thinkcentre-m75q/builds/482| fe11431a ursa-thinkcentre-m75q>
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java